Impact of SP 15 to SP21 upgradation.
We need to upgrade our Portal from SP 15 to SP 21, and hence we need to analyse what will be the impact of the upgradation. Though we are going to upgrade and test the same in Dev and Qual Servers in our landscape, we need to be cautious of the same.
Want to know what measures should we take before the upgradation and what could be the impact of the same on ESS MSS BPs, UWL, KM, Java... etc components.
Also i want to know whether this upgradation will effect Portal speed/performance as the current Prod Servers performance/speed is very slow.